Agony is a traditional Yume Nikki fangame, where the objective is to collect effects in Aoi's and Yuuka's dream world. Aoi and Yuuka have different types of Media. Aoi has two different Media: usable effects and collectibles. Yuuka, on the other hand, only has usable effects. Additionally, both have Memories that are required to unlock endings.

Agony is a traditional Yume Nikki fangame, where the objective is to collect effects in Aoi's and Yuuka's dream world. Aoi and Yuuka have different types of Media. Aoi has two different Media: usable effects and collectibles. Yuuka, on the other hand, only has usable effects. Additionally, both have Memories that are required to unlock endings.